<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script type="text/javascript">
			window.onload=function(){
				var a = 2.0;
				var b = 1.6
				var c = a-b;
				console.log(c)
				alert("haha")
			}
		</script>
	</head>
	<body>
	</body>
</html>
